Question: What was the population of San Francisco at the beginning of 1880?
Paraphrase: At the beginning of 1880, what was the population of San Francisco?
SPARQL (Wikidata): SELECT ?obj WHERE { wd:Q62 p:P1082 ?s . ?s ps:P1082 ?obj . ?s pq:P585 ?x filter(contains(YEAR(?x),'1880')) }